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Electromagnetic Wave Prob. (Is this a typo/error?)

  1. May 20, 2007 #1
    Electromagnetic Wave Prob. (Is this a typo/error??)

    http://img519.imageshack.us/img519/4536/errorko2.th.jpg [Broken]

    This is the book's solution to an E&M problem. I typed in the part that is enclosed by a red box.

    Am I not correct, and the "official" solution is wrong?!?

    It's basically a math error, but I can't believe they made it.
    Last edited by a moderator: May 2, 2017
  2. jcsd
  3. May 20, 2007 #2


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    Homework Helper

    Yes, the modulus is clearly 'a'. Who is 'they'?
  4. May 20, 2007 #3
    The book's author! :eek: (I should have said "he")
    Last edited: May 20, 2007
  5. May 20, 2007 #4


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    Staff Emeritus
    Science Advisor

    It's not necessarily the books author that writes the solutions-- it was probably one of his grad students! Anyway, books have loads of typos in; it's nothing new!
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